112 lines
3.2 KiB
GDScript
112 lines
3.2 KiB
GDScript
class_name FootstepsComponent
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extends Node3D
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@export var skeleton: Skeleton3D
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@export var movement: MovementComponent
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@export var footsteps: AudioStreamRandomizer
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@export var step_threshold := 0.1
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@export var ik_step_threshold := 0.2
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@export var ik_speed := 5.0
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const feet_names := ["LeftFoot", "RightFoot"]
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var feet: Array[Foot] = []
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var ik_time: float
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func _ready():
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for foot_name in feet_names:
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var foot = Foot.new()
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foot.bone_name = foot_name
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foot.bone_id = skeleton.find_bone(foot_name)
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foot.audio = get_node(foot_name)
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foot.position = skeleton.to_global(skeleton.get_bone_global_pose(foot.bone_id).origin)
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foot.floor_distance = INF
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foot.normal = Vector3.UP
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foot.attachment = BoneAttachment3D.new()
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foot.attachment.bone_name = foot_name
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foot.attachment.bone_idx = foot.bone_id
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foot.audio.reparent(foot.attachment)
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skeleton.add_child(foot.attachment)
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feet.append(foot)
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func _process(delta: float):
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for foot in feet:
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var global_pose := skeleton.get_bone_global_pose(foot.bone_id)
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var old_position := foot.position
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foot.position = skeleton.to_global(global_pose.origin)
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if foot.floor_distance < ik_step_threshold:
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var bone_to_global := skeleton.global_transform * global_pose
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var normal_local := bone_to_global.basis.transposed() * foot.normal
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var pose := skeleton.get_bone_pose(foot.bone_id)
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var rot := get_foot_rotation(pose.basis, normal_local)
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ik_time = minf(ik_time + ik_speed * delta, 1.0)
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skeleton.set_bone_pose_rotation(foot.bone_id, pose.basis.slerp(rot, ik_time))
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else:
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ik_time = 0
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if foot.floor_distance > step_threshold:
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continue
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foot.velocity = (foot.position - old_position) / delta
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if foot.velocity.y > 0:
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continue
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if foot.velocity.length_squared() < 1.0:
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continue
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if foot.audio.playing && foot.audio.get_playback_position() < 0.3:
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continue
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play(foot.audio)
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func _physics_process(_delta):
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var space_state = get_world_3d().direct_space_state
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for foot in feet:
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var from := foot.position
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var to := foot.position + Vector3(0, -10, 0)
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var query = PhysicsRayQueryParameters3D.create(from, to, 1)
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var result = space_state.intersect_ray(query)
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if result:
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foot.floor_distance = (foot.position - result.position).length()
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foot.normal = result.normal
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else:
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foot.floor_distance = INF
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foot.normal = Vector3.UP
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func play(audio_player: AudioStreamPlayer3D):
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audio_player.stream = footsteps
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audio_player.play()
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func get_foot_rotation(base: Basis, normal: Vector3) -> Basis:
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var rot := align_with_y(base, normal)
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return rot.rotated(Vector3.UP, PI)
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func align_with_y(base: Basis, normal: Vector3) -> Basis:
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base.x = -base.z.cross(normal)
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base.y = normal
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return base.orthonormalized()
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# func get_foot_rotation2(base: Basis, normal: Vector3) -> Basis:
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# normal.x = -normal.x
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# normal.z = -normal.z
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# return align_up(base, normal)
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# func align_up(base: Basis, normal: Vector3) -> Basis:
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# var result = Basis()
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# var node_scale = base.get_scale().abs()
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# result.x = normal.cross(base.z)
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# result.y = normal
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# result.z = base.x.cross(normal)
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# result = result.orthonormalized()
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# result.x *= node_scale.x
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# result.y *= node_scale.y
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# result.z *= node_scale.z
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# return result
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